T-ara's Soyeon expressed her confidence in the song, saying, "We knew the song would be a success. Firstly, won't unique songs capture people's attention?" Shinsadong Tiger, who composed "Bo Peep Bo Peep", then gave a shocking confession about his own confidence in the song. "When the song was released, it was embarrassing," he said. "Because the lyrics 'bo peep bo peep' repeated so much, I wondered if the song would do well." When Eunjung revealed that she didn't understand that part of the song, he admitted that he wrote it "while looking at toilet paper".

Shinsadong Tiger then explained that the inspiration behind T-ara's "Roly Poly" were snacks. In addition, he said, "For 4minute's 'Hot Issue', because Hyuna was in the news so often, I saw the phrase 'hot issue' and wrote the song."

Shinsadong Tiger has written music for several K-Pop artists, and has composed T-ara's upcoming track "Lovey Dovey".